We got a problem that is currently beyond fixing as we have really no idea what went wrong. The Indicators stopped working (or never worked since swap)

We have checked all related fuses and relays, everything seems to be ok. We checked up on the wiring with a current meter and cannot find the error. The weird part is, the indicators are working when we lock up the car and the blinkers are flashing twice on it, also the warning blinkers work.

It seems to be a problem when turning on ignition. As far as I know is that indicators are enabled on ingnition along with the rear window heating. Somehow the general electrics unit for thoose functions doesent seem to get a signal that ignition is turned on.

Anyone of you got a similar problem when doing a V6 swap or swap in general? Either we are to blind to see or there is some serious problem with the wiring but we have no idea were to start looking.